Process of preparing creosote-oil solutions



GEORGE A. COOK, OF KANSAS CITY, MISSOURI.

PROCESS OF PREPARING OREOSOTE-OIL SOLUTIONS.

intents.

No Drawing.

use only of the crudest materials and em-.

ploying a very simple mode of treatment of the same.

The supply of creosote oils of good quality has recently become quite limited, due to interruptions in foreign commerce, so that it has become necessary to devise appropriate means of domestic manufacture for producing such oils, or solutions thereof, in sufticient quantities to meet the requirements of our own markets. Accordingly, the present invention provides a method or process whereby a creosote oil solution of high grade is obtained by using only crude tar and treating this with ordinary petroleum or a derivative therefrom.

This process consists in the mixing of a quantity of tar with petroleum, either the crude petroleum product or some cheap distillate thereof, and then preferably agitating this mixture to accelerate the process,

, whereupon the pitch is precipitated from the mixture and the upper layer of creosote oil solution may be removed in any approved manner.' If ordinary coal tar be used, I find good results are obtained by using approximately equal parts of such tar and petroleum, but other proportions may be used according to the grade of materials used or the quality of creosote oil solution desired. In the use of water gas tar as one part of the mixture, 1 find the best results are obtained by mixing this with an approximately equal amount of coal tar, so that the mixture would comprise, say, approximately 25% coal tar, 25% water gas tar and petroleum, which mixture is allowedto settle and the upper layer of creosote oil solution removed as above indicated.

While no heat is required for the carry- Specification of Letters Patent.

Patented June 8, 1%20.

Application filed March 13, 1916. Serial No. 83,871.

ing out of this process, it is found that the action is somewhat accelerated by heating as well as by agitating the mixture, and that a harder precipitate is deposited. But the application of heat is not at all essential, and the practice of the method is entirely satisfactory Without it. Hence, in addition to the cheapness of the cost of the necessary materials, it is obvious that theequipment required for the carrying on of the above process will also be extremely simple and inexpensive.

The creosote oil solution produced by this tar and petroleum process is found to possess unusually effective water-proofing characteristics, which is deemed to be at least partially due to the fact that the entire tar product is employed in the process, so that all of the tar ingredients are present throughout the whole process of forming the solution, which is not the case where a portion of these ingredients are distilled off in carrying out the oil-separating process as formerly. It is also found that the solution of oil as obtained by the present process possesses a much higher degree of penetrating power than ordinarily characterizes such oils, which may be attributed partly to the fact that there is very little carbon left in the solution by my process.

While I have set forth what now appears to be the preferred and most effective mode of practising my invention, I hereby reserve the right to such modifications therein as may fairly fall within the scope of the appended claims.

I claim- 1. The herein-described processof preparing a solution of creosote oil which consists in mixing, in approximately equal proportions, tar and petroleum, al owing the mixture to settle, and thereafter removing the upper layer of clear oil solution thus formed.

2. The herein-described process of preparing a solution of creosote oil which consists in mixing coal tar, water-gas tar, and petroleum, in approximately the proportion of 25 per cent. of coal tar, 25 per cent. of water-gas tar, and 50 per cent. of petroleum, allowing the mixture to settle, and thereafter removing the upper layer of clear oil solution thus formed.

GEORGE A. COOK. 

